@article{GDZPPN002220970,
title = {Fields with Two Incomparable Henselian Valuation Rings.},
journal = {Manuscripta mathematica},
volume = {22},
year = {1977},
pages = {373-386},
zbl = {0384.12011},
url = {http://dml.mathdoc.fr/item/GDZPPN002220970}
}
Engler, Antonio J. Fields with Two Incomparable Henselian Valuation Rings.. Manuscripta mathematica, Tome 22 (1977) pp. 373-386. http://gdmltest.u-ga.fr/item/GDZPPN002220970/